How many watts of solar energy are there in the field

How much solar energy falls on Earth annually?

Averaged over an entire year, approximately 342 watts of solar energy fall upon every square meter of Earth. The Sun is the major source of energy for Earth’s oceans, atmosphere, land, and biosphere.

How much solar energy does the Earth receive?

In addition to being free as a source of energy (it does cost money to harness it and turn it into electricity), energy from the sun is practically limitless. The surface of the Earth receives solar energy at an average of 343 W/m 2. If we multiply this times the surface area of the Earth, about 5x10 14 m 2, we get 1715x10 14 W.

How much solar energy does the world use?

The world currently has a cumulative solar energy capacity of 850.2 GW (gigawatts). 4.4% of our global energy comes from solar power. China generates more solar energy than any other country, with a current capacity of 308.5 GW. The US relies on solar for 3.9% of its energy, although this share is increasing rapidly every year.

How much power does the Sun have per square metre?

The power of the Sun at the Earth, per square metre is called the solar constant and is approximately 1370 watts per square metre (W/m 2). The solar constant actually varies by +/-3% because of the Earth's slightly elliptical orbit around the Sun.

How many terawatts of energy can a solar system generate?

Taylor says. Solar thermal systems covering 10 percent of the world's deserts — about 1.5 percent of the planet's total land area — could generate about 15 terawatts of energy, given a total efficiency of 2 percent. This amount is roughly equal to the projected growth in worldwide energy demand over the next half-century.

How much energy does a solar panel generate?

The most efficient solar panels on the market convert approximately 22% of solar irradiance to electrical energy. This means that, averaged over an entire 24 hour cycle, the solar electric power which could be generated is 73 W/m 2, which is approximately 5% of the solar constant.